RuntimeError: __iter__() is only supported inside of tf.function or when eager execution is enabled.

使用tensorflow1.5.1出现如下报错：

根据其他博客的报错分析添加链接描述，由于我所用的tensorflow为1.5.1版本，在import tensorflow as tf后添加tf.enable_eager_execution() 命令。

import numpy as np
import pandas as pd
import tensorflow as tf
tf.enable_eager_execution() 
from tensorflow import feature_column
from tensorflow.keras import layers
from sklearn.model_selection import train_test_split

值得注意的是，需要在最开始运行程序的时候运行该命令，否则会出现报错ValueError: tf.enable_eager_execution must be called at program startup.